package com.tensorflow.controller;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

@WebServlet("/LogOutServlet")
public class LogOutServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
	
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		HttpSession session = request.getSession();
		if (session.getAttribute("user")!=null) {
			session.removeAttribute("user");
			request.getRequestDispatcher("HomePage.jsp").forward(request, response);
		} else if (session.getAttribute("stu")!=null) {
			session.removeAttribute("stu");
			request.getRequestDispatcher("HomePage.jsp").forward(request, response);
		} else if (session.getAttribute("tch")!=null) {
			session.removeAttribute("tch");
			request.getRequestDispatcher("HomePage.jsp").forward(request, response);
		}else {
			request.getRequestDispatcher("error.jsp").forward(request, response);
			return;
		}
	}


	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doGet(request, response);
	}

}
